Confronta i metodi

	Studio di caso longitudinale	Ricerca-Azione	Etnografia	Teoria Fondata
Campo	Qualitativo	Ricerca qualitativa	Qualitativo	Ricerca qualitativa
Famiglia	Process / pipeline	Process / pipeline	Process / pipeline	Process / pipeline
Anno di origine	1984–1990 (foundational methodological codification)	1946	c. 1922 (Malinowski's Argonauts of the Western Pacific)	1967
Ideatore	Robert K. Yin (case study methodology); Andrew M. Pettigrew (longitudinal field research)	Kurt Lewin; expanded by Kemmis, McTaggart, Reason & Bradbury	Bronisław Malinowski (modern ethnography); rooted in 19th-century anthropology	Barney Glaser and Anselm Strauss
Tipo	Qualitative research design	Method	Qualitative fieldwork tradition	Method
Fonte seminale	Yin, R. K. (2018). Case Study Research and Applications: Design and Methods (6th ed.). Sage. ISBN: 978-1506336169	Lewin, K. (1946). Action research and minority problems. Journal of Social Issues, 2(4), 34–46.	Hammersley, M. & Atkinson, P. (2019). Ethnography: Principles in Practice (4th ed.). Routledge. ISBN: 978-1138504462	Glaser, B. G., & Strauss, A. L. (1967). The discovery of grounded theory: Strategies for qualitative research. Aldine.
Alias	longitudinal case research, panel case study, repeated case study, temporal case study	Participatory Action Research, PAR, Collaborative Inquiry	Etnografi, participant observation, fieldwork, ethnographic research	GT, Grounded Theory Approach
Correlati	6	1	5	3
Sintesi	A longitudinal case study is a qualitative research design that combines the in-depth, contextually rich focus of case study methodology with repeated data collection across multiple time points. Rather than capturing a single snapshot, it follows one or a small number of cases — an individual, group, organisation, or programme — over months or years to trace how processes, relationships, and meanings evolve. This design is well suited to questions about how and why things change, not merely what the state of affairs is at one moment.	Action research is a collaborative research methodology in which researchers work with practitioners and community members to investigate a problem, implement change, and evaluate outcomes, cycling through reflection, action, and learning. Developed by Kurt Lewin (1946), action research bridges research and practice, aiming simultaneously to produce knowledge and practical improvement.	Ethnography is a qualitative research tradition in which a researcher immerses themselves in a social group or community over an extended period — typically three to six months or longer — to study its culture, values, and behaviours in their natural setting. Originating in social and cultural anthropology, and consolidated as a rigorous method by Bronisław Malinowski in the early twentieth century, ethnography produces rich, contextualised accounts of how people live, work, and make meaning together.	Grounded Theory (GT) is a systematic qualitative research methodology in which theory emerges directly from data through iterative analysis, rather than being imposed before data collection. Developed by Barney Glaser and Anselm Strauss in 1967, GT prioritizes generating explanatory frameworks grounded in evidence.